1. They are known to regulate axillary bud growth and apical dominance . 2. The mechanism of apical dominance is based on the plant hormone auxin. 3. It was first discovered that the plant hormone auxin likely regulates apical dominance in 1934. 4. But then our definition of tree, requiring apical dominance , seems odd to me. 5. Occasionally, strong apical dominance is advantageous, as in the " Ballerina " apple trees. 6. Apical dominance occurs because the shoot apical meristem produces auxin which prevents axillary buds from growing.7. Recent investigations into apical dominance and the control of branching have revealed a new plant hormone family termed strigolactones. 8. Reiterations are identified by an upturned branch that had gained apical dominance and formed an additional branch supporting trunk. 9. If apical dominance is complete, it prevents any branches from forming as long as the apical meristem is active. 10. Elongation is controlled by the plant hormones called auxins, which are produced by the growing tip to maintain apical dominance .
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